uncurl
verb /ˌʌnˈkɜːl/
  /ˌʌnˈkɜːrl/
[intransitive, transitive]Verb Forms
| present simple I / you / we / they uncurl |    /ˌʌnˈkɜːl/   /ˌʌnˈkɜːrl/  | 
| he / she / it uncurls |    /ˌʌnˈkɜːlz/   /ˌʌnˈkɜːrlz/  | 
| past simple uncurled |    /ˌʌnˈkɜːld/   /ˌʌnˈkɜːrld/  | 
| past participle uncurled |    /ˌʌnˈkɜːld/   /ˌʌnˈkɜːrld/  | 
| -ing form uncurling |    /ˌʌnˈkɜːlɪŋ/   /ˌʌnˈkɜːrlɪŋ/  | 
- to become straight, or to make something become straight, after being in a curled position
- The snake slowly uncurled.
 - uncurl something/itself The cat uncurled itself and jumped off the wall.
 
Oxford Collocations DictionaryUncurl is used with these nouns as the object:- fist